[U-Boot] [PATCH 13/13] mips: jz47xx: Add Creator CI20 platform

[Tom Rini <trini@konsulko.com>]

On Wed, Feb 15, 2017 at 12:03:32AM +0100, Marek Vasut wrote:
> On 02/14/2017 11:58 PM, Tom Rini wrote:
> > On Sun, Feb 12, 2017 at 12:52:45PM +0100, Andreas F?rber wrote:
> >> Hi Marek,
> >>
> >> Am 01.12.2016 um 02:06 schrieb Marek Vasut:
> >>> From: Paul Burton <paul.burton@imgtec.com>
> >>>
> >>> Add support for the Creator CI20 platform based on the JZ4780 SoC.
> >>> The DTS file comes from Linux 4.6 as of revision
> >>> 78800558d104e003f9ae92e0107f1de39cf9de9f
> >>>
> >>> So far, there are still a few details which will have to be fixed
> >>> once they are fleshed out in Linux:
> >>> - pinmux: Thus far, this board just pokes the pinmux registers to
> >>>           set the pinmux. For MMC in SPL, this will have to stay.
> >>> 	  But for full u-boot a proper pinmux driver will have to
> >>> 	  be added once the pinmux semantics in DT are in mainline
> >>> 	  Linux.
> >>> - ethernet,efuse: DT bindings are missing from mainline Linux.
> >>>
> >>> Signed-off-by: Marek Vasut <marex@denx.de>
> >>> Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
> >>> Cc: Paul Burton <paul.burton@imgtec.com>
> >>> ---
> >>>  arch/mips/dts/Makefile        |   1 +
> >>>  arch/mips/dts/ci20.dts        | 114 ++++++++++++++
> >>>  arch/mips/mach-jz47xx/Kconfig |  11 ++
> >>>  board/imgtec/ci20/Kconfig     |  35 +++++
> >>>  board/imgtec/ci20/Makefile    |   5 +
> >>>  board/imgtec/ci20/README      |  10 ++
> >>>  board/imgtec/ci20/ci20.c      | 354 ++++++++++++++++++++++++++++++++++++++++++
> >>>  configs/ci20_defconfig        |  28 ++++
> >>>  include/configs/ci20.h        | 105 +++++++++++++
> >>>  9 files changed, 663 insertions(+)
> >>>  create mode 100644 arch/mips/dts/ci20.dts
> >>>  create mode 100644 board/imgtec/ci20/Kconfig
> >>>  create mode 100644 board/imgtec/ci20/Makefile
> >>>  create mode 100644 board/imgtec/ci20/README
> >>>  create mode 100644 board/imgtec/ci20/ci20.c
> >>>  create mode 100644 configs/ci20_defconfig
> >>>  create mode 100644 include/configs/ci20.h
> >>
> >> I've looked into testing the remainder of this patchset, not seeing a
> >> newer version. You can find my branch here:
> >>
> >> https://github.com/afaerber/u-boot/commits/ci20
> > [snip]
> >>   LD      spl/u-boot-spl
> >> mipsel-suse-linux-ld.bfd: u-boot-spl section `.data' will not fit in
> >> region `.sram'
> >> mipsel-suse-linux-ld.bfd: region `.sram' overflowed by 288 bytes
> > 
> > I can recreate that too here real quick, but can't test out changes on
> > my Ci20 right now.  Can you try:
> > 
> > diff --git a/include/configs/ci20.h b/include/configs/ci20.h
> > index 4503adb..9e2ad7b 100644
> > --- a/include/configs/ci20.h
> > +++ b/include/configs/ci20.h
> > @@ -70,10 +70,10 @@
> >  /* SPL */
> >  #define CONFIG_SPL_FRAMEWORK
> >  
> > -#define CONFIG_SPL_STACK		0xf4008000 /* only max. 2KB spare! */
> > +#define CONFIG_SPL_STACK		0xf4008200 /* only max. 1.5KB spare! */
> >  
> >  #define CONFIG_SPL_TEXT_BASE		0xf4000a00
> > -#define CONFIG_SPL_MAX_SIZE		((14 * 1024) - 0xa00)
> > +#define CONFIG_SPL_MAX_SIZE		((14 * 1024) - 0x800)
> 
> This will not work, the stack is configured at it's limit already.
> 
> >  #define CONFIG_SPL_BSS_START_ADDR	0xf4004000
> >  #define CONFIG_SPL_BSS_MAX_SIZE		0x00002000 /* 512KB, arbitrary */
> > 
> > 
> > Now, off the top of my head I'm only giving myself a 50/50 chance of
> > having moved the stack address in the correct direction.  And note that
> > I don't know why we say only max of 2KB for stack, and then ensure we
> > have 2.5KB of room, but I've shifted 512 bytes from one side to the
> > other.  And it's quite probable that we should make use having SPL stack
> > get moved into DDR
> 
> You mean the DDR which you init in the SPL ? :)

Yes, I mean the DDR which we init in the SPL, after we've init'd it, so
that we can work more comfortably in cramped and constrained spaces.

> >, but I don't have the memory map handy either (and
> > based on the above snippets I'm confused as CONFIG_SPL_BSS_START_ADDR
> > should be in DDR space, I don't know if internal memory directly follows
> > into DDR here or what).
> > 
> > I do want to reiterate that I am eager to have Ci20 be working in
> > mainline as I have one and I want to figure out how to include it in my
> > farm, or at least manual testing from time to time.  Thanks!
> 
> Well, these patches were rotting on the list for year or so without
> getting any attention, until the point I had to scream on the IRC to get
> ANY review comments, multiple times, so I really see a lot of interest
> in getting this in, indeed :)

Yeah, I feel bad about not having more time for all of the various
things I'd like to see happen, happen.  But that's why I bought the Ci20
and Ci40 (and some other boards) as a regular person rather than try and
get a freebie.

-- 
Tom
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